<?php

$care = array("I","O","U");
echo $care[0];
echo $care[1];
echo $care[2];

echo'<pre>';
print_r($care);
count($care);


foreach($care as $value){
    echo '$value';
}

echo "<hr/>";
echo "forrach::::.<br/>";
foreach($care as $value) {
    echo $value . "<br/>";
}

$grades = array("优秀","良好","及格","不及格");
?>

<form><select name="grade"><?php foreach($grades as $value);?>
        <option value="<?php echo $value; ?>"><?php echo $value;?>
        <?php endforeach; ?>
        </option>
    </select>
</form>